Results 1 to 10 of about 611,430 (235)

Optimization of Turbulence Model Parameters Using the Global Search Method Combined with Machine Learning

open access: yesMathematics, 2022
The paper considers the slope flow simulation and the problem of finding the optimal parameter values of this mathematical model. The slope flow is modeled using the finite volume method applied to the Reynolds-averaged Navier–Stokes equations with ...
Konstantin Barkalov   +5 more
doaj   +1 more source

Improved Modular Division Implementation with the Akushsky Core Function

open access: yesComputation, 2022
The residue number system (RNS) is widely used in different areas due to the efficiency of modular addition and multiplication operations. However, non-modular operations, such as sign and division operations, are computationally complex.
Mikhail Babenko   +2 more
doaj   +1 more source

Construction of a gas condensate field development model

open access: yesOpen Computer Science, 2022
This article has developed and verified a mathematical aggregated approximate model of developing a gas condensate field using a cyclic process. The essence of the cyclic process is to pump the drained gas into the productive formation to reduce the ...
Skiba Alexander K.
doaj   +1 more source

Digital Filter Architecture Based on Modified Winograd Method F(2× 2, 5× 5) and Residue Number System

open access: yesIEEE Access, 2023
Improving the characteristics of digital signal processing devices is an important task in many practical problems. The paper proposes the architecture of a two-dimensional digital filter with a $5\times 5$ mask, in which calculations are performed ...
Georgii Valuev   +3 more
doaj   +1 more source

Mathematical programming in Mathcad and Mathematica [PDF]

open access: yesE3S Web of Conferences, 2023
An article generalizes the long-term work of authors with packages of applied mathematical programs. It discusses and demonstrates the features and methods of solution of mathematical tasks in mathematical package Mathcad and Mathematica: from the ...
Vasileva Natalia   +2 more
doaj   +1 more source

MABAC framework for logarithmic bipolar fuzzy multiple attribute group decision-making for supplier selection

open access: yesComplex & Intelligent Systems, 2023
In this article, we introduce logarithmic operations on bipolar fuzzy numbers (BFNs). We present some new operators based on these operations, namely, the logarithm bipolar fuzzy weighted averaging (L-BFWA) operator, logarithm bipolar fuzzy ordered ...
Chiranjibe Jana   +4 more
doaj   +1 more source

A model-based clustering via mixture of hierarchical models with covariate adjustment for detecting differentially expressed genes from paired design

open access: yesBMC Bioinformatics, 2023
The causes of many complex human diseases are still largely unknown. Genetics plays an important role in uncovering the molecular mechanisms of complex human diseases.
Yixin Zhang, Wei Liu, Weiliang Qiu
doaj   +1 more source

Multiple Error Correction in Redundant Residue Number Systems: A Modified Modular Projection Method with Maximum Likelihood Decoding

open access: yesApplied Sciences, 2022
Error detection and correction codes based on redundant residue number systems are powerful tools to control and correct arithmetic processing and data transmission errors.
Mikhail Babenko   +7 more
doaj   +1 more source

E-B-invexity in E-differentiable mathematical programming

open access: yesResults in Control and Optimization, 2021
In this paper, a new concept of generalized convexity is introduced for (not necessarily) differentiable optimization problem with E-differentiable functions. Namely, for an E-differentiable function, the concept of E-B-invexity is defined.
Najeeb Abdulaleem
doaj   +1 more source

On Some Aspects of the Examination in Econometrics

open access: yesJournal of Vasyl Stefanyk Precarpathian National University, 2021
Teaching econometrics has been studied by a number of researchers, however, there is little information available on the quality of examination and on simplification of tests for demonstration the high-quality knowledge by students in concrete topics of ...
Symon Serbenyuk
doaj   +1 more source

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